Selectable cloud textures (from Alchemy)

Option is in Clouds tab of the Advanced Sky Editor.

indra/newview/app_settings/settings_ascent.xml

@@ -222,6 +222,17 @@
       <string>Boolean</string>
       <key>Value</key>
       <integer>0</integer>
+    </map>
+    <key>AlchemyWLCloudTexture</key>
+    <map>
+      <key>Comment</key>
+      <string>Name of local cloud texture to use for windlight</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>String</string>
+      <key>Value</key>
+      <string>Default.tga</string>
     </map>
 		<key>AscentPowerfulWizard</key>
 		<map>